Toast the pecans: Preheat your oven to 325°F (165°C). Spread pecan halves on a baking sheet and toast for 6–8 minutes until fragrant. Let them cool.
Make the caramel: In a small saucepan over medium heat, add butter and brown sugar substitute.
Stir until melted and combined, about 2–3 minutes.
Add the cream: Carefully pour in the heavy cream while stirring. Let the mixture simmer gently for 4–6 minutes, stirring often, until slightly thickened and glossy.
Finish the caramel: Remove from heat. Stir in vanilla and 1/4 teaspoon sea salt.
The caramel will thicken as it cools. If it seems too thin, return to heat for another minute.
Prepare the base: Line a baking sheet with parchment. Arrange pecans in small clusters of 3–4 halves each, spaced an inch apart.
Spoon on the caramel: Add about 1 teaspoon of caramel over each pecan cluster, letting it drip to hold the nuts together.
Chill the tray in the fridge for 15–20 minutes to set.
Melt the chocolate: In a microwave-safe bowl, combine sugar-free chocolate and coconut oil. Heat in 20–30 second bursts, stirring between each, until smooth. You can also use a double boiler.
Coat the clusters: Spoon melted chocolate over each caramel-pecan mound, covering most of the caramel.
Tap the tray gently to level the chocolate.
Finish and set: Sprinkle with a pinch of flaky sea salt if you like. Chill for 20–30 minutes until firm.
Serve: Enjoy straight from the fridge or let them sit at room temp for 5 minutes for a softer bite.